Home / 3,729.20-5,612.75-2,809.40

Finding the Fourth Proportional to 3,729.20, 5,612.75 and 2,809.40

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Solution

The fourth proportional to 3,729.20, 5,612.75 and 2,809.40 is: 4,228.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,729.20 : 5,612.75 = 2,809.40 : x
  2. Step 2: Convert to fraction form
    3,729.20/5,612.75 = 2,809.40/x
  3. Step 3: Cross multiply
    3,729.20x = 5,612.75 × 2,809.40
  4. Step 4: Simplify right side
    3,729.20x = 15,768,459.85
  5. Step 5: Solve for x
    x = 15,768,459.85/3,729.20
  6. Step 6: Final answer
    x = 4,228.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.